Easton's Bible Dictionary (1897)
The thorn, the head of one of the courses of the priests (1 Chr. 24:10).
Smith's Bible Dictionary (1863)
(thorn), a priest, the chief of the seventh course in the service of the sanctuary, as appointed by David. (1 Chronicles 24:10) In (Ezra 2:61) and Nehe 3:4,21 The name occurs again as Koz in the Authorized Version.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
HAK'KOZ (the thorn), the head of the seventh course of priests. 1 Chr 24:10.
Hitchcock's Bible Names (1869)
a thorn; summer; an end